The rapid development of new energy vehicles has put forward extremely high requirements for the battery thermal management system to ensure that the battery can be in the best working state under various working conditions. As a key material, silicone rubber plays an indispensable role in the battery thermal management system of new energy vehicles, and its performance is also constantly optimized to meet the development needs of the industry.

In the sealing link of the battery module, silicone rubber seals are crucial. The battery module generates heat during the charging and discharging process, and it requires a good heat dissipation channel. At the same time, it is necessary to prevent the intrusion of impurities such as dust and moisture to avoid battery short circuits and other faults. Silicone rubber has excellent sealing performance and can closely fit all components of the battery module to form a reliable sealing barrier. Its good flexibility enables the seals to adapt to the tiny deformations of the battery module at different temperatures and always maintain the sealing effect. In addition, the chemical corrosion resistance of silicone rubber can effectively resist the erosion of chemical substances such as battery electrolytes, ensuring the long-term reliability of the seals and the safe and stable operation of the battery module.
In terms of battery heat conduction, silicone rubber also performs excellently. Silicone rubber-based thermal conductive pads are widely used between the battery and the heat sink. These pads can efficiently transfer the heat generated by the battery to the heat sink, and then the heat is dissipated through the cooling system. By adding high thermal conductivity fillers such as aluminum oxide and aluminum nitride, the thermal conductivity of silicone rubber is greatly improved, thus significantly increasing the battery heat conduction efficiency. In some high-performance electric vehicles, the optimized silicone rubber thermal conductive pads can effectively reduce the battery operating temperature, extend the battery life, and improve the battery performance.
In order to meet the higher requirements of the battery thermal management system of new energy vehicles for the performance of silicone rubber, researchers optimize the performance from multiple aspects. In terms of material formulation, by precisely controlling the type, content, and distribution of fillers, and optimizing the cross-linking density of silicone rubber, the synergistic optimization of the material's thermal conductivity, flexibility, mechanical strength, and other properties is achieved. For example, by using nano-scale thermal conductive fillers, the contact area between the fillers and the silicone rubber molecular chains is increased, and the heat conduction efficiency is improved. At the same time, the cross-linking process is optimized to enable the material to have sufficient mechanical strength while maintaining high flexibility to cope with various stresses during the assembly and use of the battery module. In terms of manufacturing processes, advanced processing technologies such as hot pressing and injection molding are introduced to improve the dimensional accuracy and quality stability of silicone rubber products, ensuring that products such as seals and thermal conductive pads can be accurately installed and operate efficiently in the battery thermal management system.

General purpose Precipitated Extruded Silicone Rubber